Hydraulic apparatus



J. H. KERBER HYDRAULI C APPARATUS Filed July28, 1933 3 Sheets-Sheet l INVENTOR ORNEY Feb. 18, 1936. J. H. KERBER HYDRAULIC APPARATUS s Sheets-Sheet 2 Filed July 28, 1935 INVENTg; y {614410 Ema.

ATTORNEY Feb 18, 1936. J. 'H. KERBER HYDRAULIC APPARATUS 3 Sheets-Sheet 5' Filed July 28, 1953 INVENTOR BY W [77 6' 7 /uuaL TTORNEY v Patented Feb. 18, 1936 PATENT OFFICE -HYDRAULUZ APPARATUS Joseph H. Ker-her, Milwaukee, Wis., assignor to iii-Way Service Corporation, Milwaukee, Wis a corporation of Wisconsin Application July 28, 1933, Serial No. 682,571

3 Claims. (Cl. 103-2) The invention relates to hydraulic power producing apparatus.

One of the great problems with hydraulic apparatus is the liability of leakage and the necesmy in most cases for the use of stufiing boxes to prevent leakage and the liability of the stuifing boxes not functioning properly due to neglect-or wear. Where the hydraulic equipment is in the hands of unskilled users, as is frequently 0 the case, this matter of leakage is a serious one from an operating and maintenance standpoint.

It is one of the objects of the present invention to provide an hydraulic apparatus wherein the pump and the control 'valve mechanism are mounted in a casing containing the working fluid and any leakage from the high pressure side of the pump and valve is free to drain into the casing. I

A further object of the invention is to provide a high pressure pump unit enclosed within a casing containing the working fluid for said unit, said unit having an operating connection extending from said casing which only needs to be sealed against the relativelysmall static head ,of fluid in said casing.

Theinvention further consists in the several features hereinafter set forth and more particularly defined by claims at the conclusion hereof.

the drawings;

. I -Fig. 1 is a vertical sectional view through an apparatus'embodying the invention, parts-being broken away and thesectionbeing taken along the line I-I of Fi 2;

Fig. 2 is a vertical sectional view taken generally. along the broken line 2-'2 of Fig. 1;

Referring to the drawings, the numeral 6 designates a base member, I a head member, and

8 a tube or wall member having fluid tight connection at its ends with said base and head members and forming a casing therewith into which oil or other suitable working fluid is introduced through a filling opening 9 normally closed by a pipe plug III provided with a vent opening II.

A pump block or body I2 is provided with spaced bores l3 in which the plungers I4 reciprocate. The body I2 is securely clamped to the base 6 by bolts I5 extending up through the base and into said body, the ends of the bores I3 being sealed by copper gasket rings I6 put under compression by the clamping of said body to said base. Vertically disposed passages I1 are formed in the base 6 and communicate with the bores I3. The upper end of each passage H has a pipe 0 thread formed therein in which the tapered threaded end l8 of the casing IQ for the discharge valve is fltted. The casing I 3 has a discharge passage extending through it with a reduced opening 20 in itsupper end adapted to be m closed off by a ball valve 2I during the suction stroke of the pump, said ball being limited in its movement by a pin '22 extending transversely through the side walls of said casing I9 and having a drive fit therein. The passages I! are con- 15 nected together by a passage 23 and to a common discharge pipe 24 by the passage 25 extending from one end of the passage 23.

A laterally disposed inlet passage 26 communicates with each bore I3 and has a pipe threaded 20 outer end adapted to receive the tapered threaded end 21 of the casing 28 for the inlet valve. The casing 28 has a passage extending through it with a reduced opening 29 in its upper end adapted to be closed off by a ball valve-30 during the 5 discharge stroke of the pump, said ball being limited in its movement by a pin 3| extending transversely through the side walls of said casing 28 and having a drive fit therein. The passages of the inlet valves communicate directly 30 with the interior of the casing formed by the members I, 8 and 9.

The base member 6 forms the head end of the pump and it has a conically inclined edge or seat 32 adapted to receive a similarly inclined edge 33 35 of the tube 8 to form a fluid tight joint therewith. The upper end of the tube has an inclined edge 34 that seats against a similar edge 35 formed on the head I and bolts 36 extend through the head I and into the body I2 and clamp the 40 head I and tube 8 together and the tube against the base 6.

Each plunger I4 is operatively connected by a link 31 to one arm of an oscillatory lever 38 which is connected by a screw 39, having a tapered 45 pin end, to the shaftend 40 of an operating crank 4I, said shaft being journalled in bearing bosses 42 formed in parts of the body I2. The shaft 40 extends through'an opening 43 in the side wall of the casing enclosing the pump body and a. tubular boss 44 is welded or otherwise suitably secured to the tube 8 adjacent this opening and has a sealing means mounted therein including a flexible sealing ring member 45 held against the shaft by a suitable spring 46, it being noted 66 that this sealing means is not a heavy duty seal but only has to seal against the static head of fluid in the casing containing the pump body. The crank 4i is shown as provided with an operating handle extension 41 and it is to be noted that the tube 6 may be positioned as to bring the operating crank at either the left or right hand side of the pump. 1 g I The control valve mechanism includes a valve housing 48, a. plug valve 49 associated with said housing, and means for operating said valve.

The housing 48 has a tubular end portion 59 and a shoulder i adjacent thereto, said portion 60 projecting through an opening 62 in the head member 1 and the flat shoulder 5i being clamped to the head adJacent said opening by a nut 53 engaging the outer threaded end of said tubular portion 60.

The plug valve 49 has a tapered valve portion 64 fitting the similarly tapered bore 55 of the housing 48 and a shank 56 extending through the tubular end portion 50 and provided with a polygonal end 51 upon which the socketed end of an operating handle 58 is mounted. The valve is normally held in seating relation with the housing by a spring 59 interposed between the end of said valve and a plug 60 which has threaded engagement with the threaded end 6i of said housing.

The valve 49 is adapted to control the flow of working fluid from the discharge of the pump and back to the suction side thereof and in the present instance controlthe ports 62, 63, 64 and 65 in the casing 48, said valve having recesses 66 formed therein so that two ports may be bridged or connected together at one setting of the valve.

The pipe 25 conducts the discharge from the pump to the port 64 while pipes 61 and 68 connect the ducts 63 and 65 with passages 69 and III in the base 6 from which the pipes H and 12 lead to the device to be operated. A pipe I3 connects the port 62 with the space surrounding the pump and extends down to a position adjacent the bottom of said space. When the valve is in the position shown in Fig. 4 the pump is shut off. When the valve is in the full line position shown in Fig. 5, the discharge from the pump coming from pipe 25 passes through port 64 across one of the recesses 66 to the port 65 and thence through pipe 68 and passage 19 to the pipe I2 while fluid may be returned through pipe Ii, passage 69, pipe 61, duct 63, recess 66, duct 62 and pipe 13 to the suction side of the pump. Another position is shown by dotted line in Fig. 5, wherein the pressure fluid is conducted to the pipe 1i and the fluid returned by way of pipe 12, it being understood that the pipes 1i and 12 communicates with diflerentparts of a hydraulically operated device, for example, opposite sides of an hydraulically operated piston.

The valve 49 works under high pressure and to prevent leakage along the shank 66 to the outside, a groove 14 is formed adjacent the head 44 of the] valve and communicates with a duct I6 in the housing 48 which leads to the space within the tube 6 so that any leakage from the valve is returned back to the suction side of the pump. 5 It is also to be noted that the pipes 25, 61, 68 and 13 are also disposed in the casing enclosing the pump and valve and that the shaft 40 may be secured in position after the casing parts have been assembled as access of a screw driver or other suitable tool to the interior of said casing to manipulate the screw pin 88 may be had through the opening 9.

From the foregoing description it will be noted that any leakage past the pump piungers i4 or from the valve 49 will be delivered to the space 16 enclosing the pump and the valve so that the use of stufling boxes to seal against high pressures is avoided.

I desire it to be understood that this invention is not to be limited to any particular form or arrangement of parts except in so far as such limitations are included in the claims.

What I claim as my invention is:

1. In an hydraulic apparatus, the combination of a base, a pump cylinder mounted on said base,

a plunger working in said cylinder, a head member, a control valve operatively connected to said pump cylinder and mounted on said head member and controlling the discharge from said pump. a casing member having a fluid tight connection with said base and head member and forming therewith an enclosing casing for said pump cylinder, plunger and valve, and means for actuating said plunger including a shaft extending through a wall of said casing member.

2. In an hydraulic apparatus, the combination of a plunger type pump, a housing enclosing the high pressure working parts of said pump and communicating with the suction side of said pump, a valve housing mounted on said first named housing, a conduit connecting said housing with the discharge side of the pump, a valve mounted in said valve housing and having an exteriorly extending operating shank and controlling the discharge from said pump, and means for returning any leakage along said shank into said first named housing.

3. In an hydraulic apparatus, the combination of a base having discharge passages, a pump cylinder mounted on said base and having a bore communicating with one of said passages, a plunger working in said bore, a head member, a control valve mounted on said head member and operatively connected to said pump discharge passage and to another of said discharge passages in said base, a casing member having a fluid tight connection with said base and head member and forming therewith an enclosing casing for said pump cylinder, plunger and valve, and means for actuating said plunger. I

JOSEPH H. KERBER. 

